After a quick Google search (as well as on macosxhints.com), I'm sharing this feature I discovered by accident. If your iOS 5 device is locked and you receive a notification, you can swipe the notification instead of the 'Slide to Unlock' widget, and you will be automatically directed to the related app. If you have a passcode, you'll still be prompted to enter it.

This was a good hint. I remembered seeing it in the keynote AFTER I discovered it similarly 'by accident' after installing ios5. There's probably plenty of people out there that forgot about this and are now stoked to have rediscovered it again. Thanks!